Anesthetizing machine



.|. A. HEIDBHINK AND B. J. CLARK.

AN/ESIHETIZING MACHINE.

APPLICATION FILED AUG.6 19H.

wwwa, Patented Apr.18,1922

4 Burk). Clalfk BJy/w l te JAY A. I-EIDB 1NR AND BURT J. CLARK, GF MINNEAPOLIS, MINNESOTA.

ANESTHETIZING MACHINE.

intresse.

Specification of Letters Patent.

Patented Apr., 18, 1922.

Application filed August 6, 1917. Serial No. 184,652.

To all 'whom t may concer/a Be it known that we, JAY Hnioninn and Buur J. @Laing citizens ot the United States7 residing at Minneapolis, in the county ot Hennepin and State ot lidinnesota, have invented certain new and useful iniproveinents in Aneesthetizing Machines, ot which the following is .a specii'ication.

Our invention relates to anzesthetizing machines and has for its object to provide means tor controlling the flow orp gas to a patient and for insuringits delivery under a maximum Vpressure and in a thoroughly purified condition.

The 'full objects and advantages of our invention will appear in vconnection with the detailed descriptionthereof and are particularly pointen out in the cla" s. Y

ln, the drmvinffsD illustrating the application ot our invention in one iorm,- l

Fig. 1 is a part sectional elevationy view t a portion ofa gas delivering apparatus. Fig. 2 is a sectional Velemition view oit the relief valve mechanism employed in connection withour invention. Fig. 8 is a sectional view ot a part ot the gas-introducing connections.'

As illustrate l, a poi-ion of the sumporting head ol" the n'iachine shown at 10, having arms 11 and 12 through which e.\:tend duets 13 and 15'-, The ducts 13 and 1st connnunicate with an orifice 15 controlled by a valve member 16 that is normally held seated to cover the lower end or" orifice 15 by means oi a spring 1T. The spring and valve meniber, which is in the torni of a cylindrical plunger, is housed in a tubular extension 1S that is elo-:ed by a cap 19 threaded into e);- tension 1S. and which cap provides means tor regulating the torce exerted hy spring 17. yoke piece 19 extends through apertures in the head 10 and engages with its feet the valve plunger 15 and with its top a diaphragm 2O which is supported within a chamber 21 formed in a discoidal casing E32. said chamber being in couununicaton with the space surrornuling the dischargje end of the orifice 15. The casing .22 is provided with a central extension 22% in which is a powerful coil spring Nl which is held in engagement with a seat 25 upon the duiphragm 20 and over vthe yoke 19 by means ot a plunger which is controlled by a handscrew 2T threaded into the upper portion ot extension 23. The spring through diaphragm 2O and yoke inemher 19",

the other hand, the pressure or gas admitted into chamber 21 upon the extended sur'tace of diaphragm 2O tends to resist thev force of spring 24 and neutralize its action, thus per-` mitting spring` 17 to force valve plunger 16 into closing position. Turning or screw 27 will increase or decrease the pressure of spring 24 and therefore admit gas to vchamher`21 by greater or less'pressure. as may be desired. The gas comes from containers 30 in which the gas is vstored at very high pressure.v Containersl 30 are suspendedin apertures 31 and 82 in arms 11 and 12, respectively, and have side yportions 83 adapted to be forced into vsealing engagement with:

. circular disks 84 having a neck 3,5 seated in the-body 10 sothat the aperture 136 therein i''orinsacontinuation of aperture 13., (or 14). The tace of disk/l'is preferably corrugated as, indicated at 3T, which receives corresponding corrugatons on the side 33 ot container ,30 and .a set'. screw 'BS threaded intoA the end of arm 11 holdsthese parts lin gas-tight engaement.' `lechliaiul Vvalve ,59 controls the flow otgasesy to the apertures 3e, is.

Threaded within the disk 3er-,and so that its interior berce() 'forms a continuation of passageway 36, is a nipple L11 having on the end thereot a fine wire strainer 42. This nipple seats within an aperture indicated in dotted lines at e3 in Figl. All of thev gas which passes to chamber 21 must pass through this strainer. Fine scales which may form on the interior of containers 30 are caught by this strainer' and prevented 'from passing into the passageways and the valve seat and thereby interfering with the operation ot the mechanism. The nipple 111 also provides means Ytor receiving and guiding the neck ot'. container 3 0 and a container head thereof.

rThe gas trom chamber Q1 passes through a. connector tube 4-1- to the mixing and administering chambers and pussageways. which form no part ot' our present invention und need not be described here. 1t will be apparent that the purilied and strainec gas reaches and leaves the chamber 21 at very much reduced pressure over that to which it is subjectin container.' 30. 1t is, howeverv` essential that the pressure or the gas in chamber 21 in going through passageway el shall in no instance he greater than a deapparent.

sired maximum limit. To insure against any rpossibility of gas going to passageway 4:4 at a greater pressure than this maximum through faulty operation or other causes, we provide the relief valve 50, which, as shown in Fig. 2, comprises the outer casing 5l having a multiplicity of lateral apertures 52 leading through ducts 53 to a valve seat 54' formed on the end of a tubular head 55 which has the threaded extended end 56 thereof screwed into the casing 22. Upon valve seat 54 is a valve plunger 58 normally heldin engagement with valve seat 54; by a spring 59, the force of which is adjusted'by a screw 60 threaded into the end of casing` 51 and held in fixed position by a clamp nut 61. l

The advantages of our invention will be A perfect reduction system is employed whereby gas goes to the patient not only at a reduced pressure, but at a pressure which cannot go above a definite maximum even under faulty operation. rlfhe gas so delivered is moreover freed from scale or other solid matter whichmight get under the valve closure and prevent accurate operation of the controllingmechanism.l

We claim: y

l. Anfanaesthetizing machine comprising an apertured support7 a socke'tpiece held by .said support and providingthrough the same a continuation of said aperture, a nipple removably carriedby the socket pieceV Y and 'forming a .continuation of said apperture, a strainer carried by the nipple, and

. means for holding fa container for gasl under pressure in gas-tight relation with said socket piece so as to deliver the gas through the strainer to the aperture.

2. An anaesthetizing machine comprising an apertured support, a socket piece held by said support and providing through the same a continuation of said aperture, a nipple removably carried by the socket piece and forming a continuation of said aperture, a strainer carried by the nipple, means for holding a container forgas under pressure in gas-tight relation with said socket piece so as to deliver the gas through the strainer to the aperture, a reduced-pressure chamber, means for admitting and controlling the admission of gas from said aperture into the reduced-pressure chamber, and a relief valve having connection with the reduced-pressure chamber whereby the maximum pressure of gas going to said delivering means is determined.

Y 3. An anaesthetizing machine comprising an apertured support, a socketpiece removably carried by said support, said socket piece having a anged head formed with a Y' corrugated Vplane face, a cylindrical nipple n, removably carried by said socket piece, said 'nipple and socket piece forming a continuation of the aperture, and said nipple providing la holder fora container for gas under pressure, andV a strainer formed across'the nipple.

VIn testimony whereof we affix our signa0 tures; Y

JAY A. HEIDBRINK. s BURT J; CLARK. 

